Year	current US$
1960	5.517664415860121
1961	5.370486432173365
1962	7.885703716037806
1963	9.848545491171262
1964	10.094833660046927
1965	9.622768879810272
1966	7.065115141147288
1967	8.878305451636471
1968	6.960566459290672
1969	5.685301113022973
1970	7.097719638400091
1971	6.998169174000412
1972	4.874934115864156
1973	4.39211737453954
1974	7.082779664453109
1975	10.730987979144935
1976	14.3560691952515
1977	8.188557228095418
1978	8.445990663509836
1979	9.073816459898978
1980	14.390493531020525
1981	9.520684399909163
1982	9.899098498071838
1983	7.277528761690488
1984	6.6450454973786455
1985	6.878699872137741
1986	8.03102632826581
1987	6.399548953837165
1988	10.789786780502913
1989	10.687882994612824
1990	7.872437344319513
1991	9.588890994504368
1992	6.91913170128029
1993	6.579707446183188
1994	9.185490942997399
1995	3.760888725447574
1996	5.007840211969543
1997	4.827203648237288
1998	5.674814995343421
1999	4.099216475241502
2000	3.560408536038328
2001	11.212005459756753
2002	11.953427021673896
2003	6.251322540524416
2004	7.779201553259734
2005	8.468671124045775
2006	11.565733671125786
2007	6.109676660904881
2008	5.74903896272666
2009	7.287273831645615
2010	15.084299880466123
2011	18.702461732536033
2012	9.976961174305725
2013	10.687133660928193
2014	17.36274574698345
2015	17.84155351140833
2016	13.86766096108832
2017	10.92658197954193
2018	6.311976543908167
2019	8.998479707173141
2020	11.40830594766599
2021	12.63087000450281
2022	7.8067681824695825